/*
 * Copyright 2011 LMAX Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.lmax.disruptor.dsl;

import com.lmax.disruptor.EventProcessor;
import com.lmax.disruptor.Sequence;
import com.lmax.disruptor.SequenceBarrier;
import com.lmax.disruptor.dsl.stubs.SleepingEventHandler;
import com.lmax.disruptor.support.DummyEventProcessor;
import com.lmax.disruptor.support.DummySequenceBarrier;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.CoreMatchers.nullValue;
import static org.hamcrest.CoreMatchers.sameInstance;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.junit.jupiter.api.Assertions.assertThrows;

public class ConsumerRepositoryTest
{
    private ConsumerRepository consumerRepository;
    private EventProcessor eventProcessor1;
    private EventProcessor eventProcessor2;
    private SleepingEventHandler handler1;
    private SleepingEventHandler handler2;
    private SequenceBarrier barrier1;
    private SequenceBarrier barrier2;

    @BeforeEach
    public void setUp()
    {
        consumerRepository = new ConsumerRepository();
        eventProcessor1 = new DummyEventProcessor(new Sequence());
        eventProcessor2 = new DummyEventProcessor(new Sequence());

        eventProcessor1.run();
        eventProcessor2.run();

        handler1 = new SleepingEventHandler();
        handler2 = new SleepingEventHandler();

        barrier1 = new DummySequenceBarrier();
        barrier2 = new DummySequenceBarrier();
    }

    @Test
    public void shouldGetBarrierByHandler()
    {
        consumerRepository.add(eventProcessor1, handler1, barrier1);

        assertThat(consumerRepository.getBarrierFor(handler1), sameInstance(barrier1));
    }

    @Test
    public void shouldReturnNullForBarrierWhenHandlerIsNotRegistered()
    {
        assertThat(consumerRepository.getBarrierFor(handler1), is(nullValue()));
    }

    @Test
    public void shouldRetrieveEventProcessorForHandler()
    {
        consumerRepository.add(eventProcessor1, handler1, barrier1);

        assertThat(consumerRepository.getEventProcessorFor(handler1), sameInstance(eventProcessor1));
    }

    @Test
    public void shouldThrowExceptionWhenHandlerIsNotRegistered()
    {
        assertThrows(IllegalArgumentException.class, () ->
                consumerRepository.getEventProcessorFor(new SleepingEventHandler())
        );
    }
}
